as2 - movieclip as button + colorTransform

hello all

i have found that you cannot target the content of a button (if you can, dont hesitate to correct me) like this.buttonName.mcInsideButton.

so i created a movieclip with frames and with AS i recreated the same principle as a button. i need my button content to be customizable, so via functions i change the colors of the movieclips inside the said button.

problem is, it seems that once the color is set, the x and y position of the mc inside the fake button is fixed. (in the library version, on the down frame, the images are on pixel down, while at runtime only the non colored images goes one pixel down)

anybody has some insight on this?